<template>
  <div id="app">
    <h1>项目实战Code9</h1>
    <div>
      <span>姓名:</span>
      <input type="text" v-model="name" />
    </div>
    <div>
      <span>年龄:</span>
      <input type="number" v-model.number="age" />
    </div>
    <div>
      <span>性别:</span>
      <select v-model="sex">
        <option value="男">男</option>
        <option value="女">女</option>
      </select>
    </div>
    <div>
      <button @click="addFn">添加/修改</button>
    </div>
    <div>
      <table border="1" cellpadding="10" cellspacing="0">
        <tr>
          <th>序号</th>
          <th>姓名</th>
          <th>年龄</th>
          <th>性别</th>
          <th>操作</th>
        </tr>
        <tr v-for="(item, index) in arr" :key="index">
          <td>{{ index + 1 }}</td>
          <td>{{ item.name }}</td>
          <td>{{ item.age }}</td>
          <td>{{ item.sex }}</td>
          <td>
            <button @click="delFn(item.id)">删除</button>
            <button @click="btnFn(item.id)">编辑</button>
          </td>
        </tr>
      </table>
    </div>
  </div>
</template>
<script>
export default {
  data() {
    return {
      name: "",
      age: "",
      sex: "男",
      flag:'',//标记
      arr: [
        {
          id: 10,
          name: "xm",
          age: 10,
          sex: "男",
        },
        {
          id: 11,
          name: "xh",
          age: 11,
          sex: "女",
        },
        {
          id: 12,
          name: "xl",
          age: 13,
          sex: "男",
        },
      ],
    };
  },
  methods: {
    addFn() {
      if (this.name.trim().length === 0 || this.age === 0) {
        return alert("输入内容");
      }
      if(this.flag === ''){
        this.arr.push({
          id: +new Date(),
          name: this.name,
          age: this.age,
          sex: this.sex,
        })
      }else{
        this.flag.name = this.name
        this.flag.age = this.age
        this.flag.sex = this.sex
        this.flag = ''
      }
      
      this.name ='',
      this.age='',
      this.sex='男'
    },
    delFn(id) {
      this.arr = this.arr.filter((item) => item.id !== id);
    },
    btnFn(id){
      //根据id获取arr中数据
     const newobj = this.arr.find(item =>item.id === id)
     //flag是''添加 
     this.flag = newobj
     //回显操作数据
     this.name = newobj.name
     this.age = newobj.age
     this.sex = newobj.sex
    }
  },
};
</script>
